Improvement in balanced valves for steam-engines



'lvrTrnzi STATES PATENT rrron.

FRANK M. HAIN AND CHRISTIAN WAIS, OF CINCINNATI, CHIC.

IMPROVEMENT IN BALANCED VALVES FCR STEAM-ENGINES.

Specification forming part oi Letters Patent No. 145,692, dated March 17, 1874; application filed November 20, 1873.

To all whom fit may concern:

Be it known that we, FRANK M. HATN and CHRIsTIAN WAIs, both of Cincinnati, Hamilton county, State of Chio, have invented certain new and useful Improvements in Balanced Valves for Steam-Engines, of which the following is a specification:

Our invention consists in the first part of a hollow-partitioned valve of peculiar construction, in combination with a steam-cylinder and ports to match, and a box or port-plate closely iitting against the upper surface of the valve, and provided with exhaust-ports, the object of this invention being the balancing of the valve by simple means well adapted for durable and efcient use. Our invention further consists of the provision'of adjusting-screws for the exhaust-plate, by which it can be raised and lowered to preserve the proper contact with the upper face of the valve.

Figure l is an axial section of a steam-cylinder and valve-mechanism embodying my invention. Fig. 2 is a perspective view of the valve and drivingyoke. l

A is the steam-cylinder, whose end ports a a are fed through the central port a', shown in dotted lines. B is an exhaust box or plate, which has the exhaust-ports b b communicating with the exhaust-pipe B', into which the circula-r projection b ofthe plate B fits snugly in themanner shown Ve prefer to form within the plate B a large chamber for the purpose of equalizing the egress of the steam and affording large capacity for the reception of the exhaust at the termination of each stroke. C is the valve, which is box-like in form, with a partition, C, in the middle of it to separate the exhaust side of the engine from the live-steam side. To form the exhaust connections at proper times, we provide in the valve the exhaust-ports c1 c1 and to convey steam to the respective ends ofthe cylinder, we provide the steam-ports c2 or c2 and c3, it being operative to have the two ports c2 c3 cut into one, making then but a single port on each side of the partition, which we denominate c2. It will be seen that the valve is practically balanced, there being no exterior pressure upon it, except the tritling amount on the lower side equal to one of the steam-ports. The plate B is kept in the proper location to preserve the necessary joint with the valve C by means ot' the nuts and studs E, which are placed diagonally across the plate, and the set-screws E also set diagonally to force it in the opposite direction, the nuts and studs E serving only to raise up the valve.` The valve C is operated -in Ithe usual way by tappet-arm F, tappets G, and yokerod H, or in any other preferred way.

IVe claim- 1. The combination of steam-cylinder A a a', exhaust-port plate or box B, and valve C, having partition c and ports cl c2, the parts being connected and operating substantially in the manner and for the purpose specifled.

2. The combination of cylinder A a a', exhaust-port platol or box B, valve C c c1 c2 c3, chest or frame D, and adjusting-screws E E', connected and operating substantially in the manner and for the purpose specified.

In testimony of which invention we hereunto set our hands.

FRANK M. BAIN. onnrsTrAN vvAis.

Vitnesses-z i RMILLWARD,

J. L. WARTMANN. 

